Any physiological process which can be monitored in some way may provide biofeedback, which can range from galvanic skin resistance to electroencephalograph (EEG) alpha feedback. Biofeedback techniques have several implications and applications for research in both intrapersonal and interpersonal communication. Both EEG alpha and electromyograph (EMG) feedback techniques have been used successfully in reducing anxiety and result in a general relaxation of the individual, enabling him to relate more easily to others and to his environment. Specifically, EEG alpha biofeedback techniques may be advantageous to sensitivity and encounter groups, because they increase the awareness of members. EMG feedback may be used in conjunction with systematic desensitization to reduce communication apprehension. (EE)